Accurate color, precise image reproduction and crisp, sharp text every time you print. Chemically-grown toner and HP Smart printing system technology [1] deliver consistent results and reliable performance throughout the life of the cartridge. Save time with all-in-one HP 645A LaserJet supplies. HP Smart technology [1] makes automatic adjustments to optimize print quality and enhance reliability. Minimal user intervention saves time, improves productivity and lowers overall printing costs.

• Cost-effective operation with all-in-one HP toner cartridges
• Legendary HP reliability can save you time, minimize downtime and deliver results you can count on.
• Enjoy low maintenance, trouble-free printing. HP Smart technology[1] in the toner cartridge and your printer makes HP supplies easy to install and maintain. Receive automatic alerts when a cartridge is low or out. Enjoy convenient, on-line ordering.
• Accurate color, precise image reproduction and crisp, sharp text every time you print. Chemically-grown toner and HP Smart printing system technology1 deliver consistent results and reliable performance throughout the life of the cartridge.
• Use HP LaserJet printers together with Original HP print cartridges to achieve consistent, professional results
• HP printing supplies are easy to use and maintain. With innovative HP Smart printing technology in HP toner cartridges and your printer, you receive automatic alerts when a cartridge is low or out. With HP SureSupply you can enjoy convenient, on-line ordering. And HP offers an environmentally responsible take-back program for convenient return of your empty HP printing supplies. (Using genuine HP supplies ensures availability of all HP printing features).
• Toner Color: Black

For use with the following HP LaserJet models:

• HP LaserJet 5500 Series Printers
• HP LaserJet 5550 Series Printers 

[1] Using genuine HP supplies ensures availability of all HP printing features